I assume you're talking about this answer, where you quote Einstein as saying,Originally Posted by Sam5
"For if we measure the velocity of light at different places in the accelerated, gravitation-free system K’, employing clocks U of identical constitution, we obtain the same magnitude at all these places."
I don't see how that's different than what you yourself said here:
Identical clocks measure the speed of light as exactly c both on top of the mountains and at sea-level. Same as in the box, ain't it?Originally Posted by Sam5